Budini Adrián A
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro Atómico Bariloche, Avenida E. Bustillo Km 9.5, Bariloche 8400, Argentina.
Universidad Tecnológica Nacional (UTN-FRBA), Fanny Newbery 111, Bariloche 8400, Argentina.
Entropy (Basel). 2022 May 5;24(5):649. doi: 10.3390/e24050649.
Quantum memory effects can be qualitatively understood as a consequence of an environment-to-system backflow of information. Here, we analyze and compare how this concept is interpreted and implemented in different approaches to quantum non-Markovianity. We study a nonoperational approach, defined by the distinguishability between two system states characterized by different initial conditions, and an operational approach, which is defined by the correlation between different outcomes associated to successive measurement processes performed over the system of interest. The differences, limitations, and vantages of each approach are characterized in detail by considering diverse system-environment models and dynamics. As a specific example, we study a non-Markovian depolarizing map induced by the interaction of the system of interest with an environment characterized by incoherent and coherent self-dynamics.
量子记忆效应可以定性地理解为信息从环境回流到系统的结果。在这里，我们分析并比较了这个概念在不同的量子非马尔可夫性方法中是如何被解释和实现的。我们研究了一种非操作性方法，它由具有不同初始条件的两个系统状态之间的可区分性定义，以及一种操作性方法，它由与在感兴趣的系统上执行的连续测量过程相关的不同结果之间的相关性定义。通过考虑不同的系统 - 环境模型和动力学，详细刻画了每种方法的差异、局限性和优势。作为一个具体例子，我们研究了由感兴趣的系统与具有非相干和相干自动力学的环境相互作用引起的非马尔可夫去极化映射。
